Product description:Made of carbon steel, it's totally handy for you to repair the laptop.15 varieties different sizes, every single 30 pcs(+/-1pcs), complete 450 pcs.Model Quantity: M2 x 3mm 30pcs; M2 x 4mm 30pcs; M2 x 5mm 30pcs; M2 x 6mm 30pcs; M2 x 8mm 30pcs; M2.5 x 3mm 30pcs; M2.5 x 4mm 30pcs; M2.5 x 5mm 30pcs; M2.5 x 6mm 30pcs; M2.5 x 8mm 30pcs; M3 x 4mm 30pcs; M3 x 5mm 30pcs; M3 x 6mm; M3 x 8mm 30pcs; M3 x 10mm 30pcs.Packed in a plastic box,can be used for compatible with all universal laptop, equivalent to IBM HP Mac Dell Lenovo SAMSUNG Sony Toshiba Gateway LG etc.Specification:Item: laptop screw setMaterial: 4.8 class carbon steelSize: M2 M2.5 M3Quantity: 450pcs